did 3 1/2 turns on my differential... what gear ratio do i have???

[phenix86]

so at 80mph im pushin around 2600 2700 rpm.. so before i decide to instal my 4 10s im curious to find what gear ratio i have... so i jacked up my car on the rear and marked the differential with white chalk and then i spun the wheel 1 full time and had my friend count how many times the differential turned for 1 full swing of the tire. It did almost 3 1/2 turns on the differential for one full turn on the rim. Does anyone have any idea of what kind of gears it is with almost a 3 1/2 turns???!?!? someone tell me somethin good here... hopefully 3 73's


anyone??

thanks in advance!

 

[Beau]

isn't your stock differential 3.27?

 

[Saleen201]

I would think 3.73.... isnt it 3.73 turns of the driveshaft to torn the wheel one full turn

 

[phenix86]

I would think 3.73.... isnt it 3.73 turns of the driveshaft to torn the wheel one full turn

i sure as hell hope so!!!!!

 

[phenix86]

isn't your stock differential 3.27?

ya but im thinking someone added a good gear to my car before i got it.

 

[phenix86]

btw.. my car is an AUTO

 

[Beau]

ya but im thinking someone added a good gear to my car before i got it.

oh i didnt know you bought it used..so maybe theres 3.55 gears on there or 3.73's?

 

[phenix86]

im very interested to see what it is.

 

[KaPPaBaLL]

3 and half turns on the driveshaft is exactly 3.55 gears...

 

[johndeerrm]

Im sorry to sound like a dick but this is the stupidest thread i have read in a long time.

Turn the wheel 1 time and get 1 rotation of the drive shaft you have 1:1 gears

Turn the wheel 1 time and get 3.5 rotations of the drive shaft you have 3.5:1 gears.

Just over 4 revolutions of the drive shaft to one revolution of the wheels? 4.10's!!!

 

[4.6MustangSteve]

Yup, 3.55's indeed.

 

[B C]

Almost 3.5 turns sounds like it could be 3.27 gears. Was it a just over 3.5 turns or less than 3.5 turns?

 

[mrvax]

Almost 3.5 turns sounds like it could be 3.27 gears. Was it a just over 3.5 turns or less than 3.5 turns?

Agreed. Most likely 3.27 gears.

 

[01MustangMan]

Eaither 3.27's or 3.55's

 

[HoustonGT]

If its an auto, doesn't that mean that you would also have a chip to correct the speedo and shift points if the gears were changed? Im gonna say 3.27's

 

[satter_m]

If its an auto, doesn't that mean that you would also have a chip to correct the speedo and shift points if the gears were changed? Im gonna say 3.27's

Not necessarily - someone could have used a Hypertech or other computer to correct the speedo. However, I'm going to vote for 3.27s since those are what come stock.

 

[jrc_03_gt]

probably 3.27 gears.

 

[GinoGT]

Im sorry to sound like a dick but this is the stupidest thread i have read in a long time.

Turn the wheel 1 time and get 1 rotation of the drive shaft you have 1:1 gears

Turn the wheel 1 time and get 3.5 rotations of the drive shaft you have 3.5:1 gears.

Just over 4 revolutions of the drive shaft to one revolution of the wheels? 4.10's!!!

 

[TomBadger]

I believe autos came with 3.55s, while the sticks came with 3.27s.

 

[jadesville]

I believe autos came with 3.55s, while the sticks came with 3.27s.

i believe you're right